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General Science / Re: Why do LED tail lights trail to me and not to the rest of my family?
« on: 16/01/2013 15:50:06 »
In my estimation, it is intended that these lights show up solid if viewed directly, and flickering if viewed either as your eyes dither, re-focus side to side, or if you look essentially ahead, and the Cadillac moves in your field of vision side to side (such as would happen if a vehicle were to try to run a red light from one side).
It is my understanding that humans see such intensity changes as a solid on, if viewed directly ahead and the speed is above around 24 Hz. This permits our vision to sense movies and TV as continuous motion. This must be intended as a safety feature. Bravo Cadillac. I am truly sorry that this irritates you.
Cadillac are an early adopter of technology and probably understand this phenomenon. They want to be just above your speed to sense the LED's as solid unless a vehicle moves side to side in your field of view. If your kids don't sense it, they might be able to if they look at one side of the vehicle and then the other, without letting their focus be on the vehicle itself. I understand that animals have a much higher threshold maybe around 90 Hz. That may be why animals seem to be frustrated with TV.
btw, at higher speeds than this it is possible to transfer messages, that aren't irritating or sensed by humans, are described in this patent, that I wrote a few years ago. I look forward to comments or suggestions.
http://www.freepatentsonline.com/7961086.pdf
James Bradley
It is my understanding that humans see such intensity changes as a solid on, if viewed directly ahead and the speed is above around 24 Hz. This permits our vision to sense movies and TV as continuous motion. This must be intended as a safety feature. Bravo Cadillac. I am truly sorry that this irritates you.
Cadillac are an early adopter of technology and probably understand this phenomenon. They want to be just above your speed to sense the LED's as solid unless a vehicle moves side to side in your field of view. If your kids don't sense it, they might be able to if they look at one side of the vehicle and then the other, without letting their focus be on the vehicle itself. I understand that animals have a much higher threshold maybe around 90 Hz. That may be why animals seem to be frustrated with TV.
btw, at higher speeds than this it is possible to transfer messages, that aren't irritating or sensed by humans, are described in this patent, that I wrote a few years ago. I look forward to comments or suggestions.
http://www.freepatentsonline.com/7961086.pdf
James Bradley